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Avoiding Ford Cummins Transmission Swap Problems

When swapping a diesel engine, there are many things to consider. The wiring harnesses and diagrams are essential, as all three elements have separate computer systems and require their own power and ground connections. Each has a separate OBD-II port and its own alternator will not work with a Cummins. The Ford alternator is internally regulated, and its GOS alternator will not work with a Cummins. Fortunately, Mobile Diesel Service’s crew soon realized that additional ground straps were necessary, as well.

7.3 4R100

While you may have no problems installing the new Cummins engine, you may face some challenges when it comes to the transmission. Many Ford vehicles use a 4R100 transmission, but some of them are not designed to work with an electronically controlled transmission. In addition, the older Ford Diesel engines were not very reliable, so they were replaced with Cummins diesel engines in the early 2000s. This article will explain the differences between the two transmissions and give you the information you need to avoid any problems while swapping your transmission.

One of the main issues with the 4R100 is that it is not compatible with the new 5R110W transmission. The 5R110W is more powerful, but it can’t run a 7.3L engine without an adapter. It is also very expensive, so you’ll have to invest in an adapter kit. This adapter will allow you to swap your engine into your Ford truck.

The next problem is the engine’s rpm limit. The Cummins engine has a lower rpm limit, so if you’re doing the swap, you’ll need to make some changes to the transmission’s valve body and governor. You’ll also have to change the vacuum modulator, throttle body, and valve body. Those parts are crucial to controlling the transmission’s shift points.

The transmissions in the 4R100 are difficult to transfer to other vehicles. The shift solenoids can be damaged by vibration and poor cooling. If they fail, automatic transmission fluid cannot flow through the valve body and the forward gear cannot engage. This results in the vehicle being in reverse gear. During this situation, you should get a transmission that fits. These are the most common problems experienced with swaps.


If you’re planning to install a Ford Cummins 5R110 in your truck, you should be aware that this is a tricky swap. You will need to rework the valve body and governor, as well as the throttle vacuum valve and vacuum modulator. The latter parts are responsible for shift points and transmission line pressure. The swap also requires rework on the starter pocket and bellhousing.

You should consider having the tow/haul feature custom tuned in your truck. Some Ford 6.0 powered trucks benefit from a custom tow/haul transmission. For example, you may want to consider taller tires or changing the gear ratio. But, these modifications don’t address the real issues in your truck. A custom tuned tow/haul feature will also improve the 5R110’s Torqshift function.

Although the 6L Power Strikes are known to be notorious for reliability issues, the Cummins is very common. Its main benefit is that it’s street legal. Many states have regulations prohibiting the use of agriculture engines in street vehicles. Moreover, several companies manufacture Cummins engine parts and support the swap. If you’re planning to swap a Cummins engine into a Ford truck, you need to consider a few factors. The first thing you need to keep in mind is the mileage of the truck. If you plan to swap the engine, you’ll need to replace the old one. If you’re planning on swapping a Cummins into a Ford truck, it’s better to have a few problems and more knowledge.

When you’re installing a Ford Cummins engine, you have to be aware of how to swap the ignition system. You will need a conversion kit. The simplest way to swap the motor is to replace the transmission with a Ford Cummins 5R110. For example, you’ll need a Ford 5R110 automatic transmission. There are also early Chevy transmissions that will work well with the Cummins.

Allison 1000

An Allison 1000 for Ford Cummins swap will not be a problem, as long as you follow a few simple steps. There are three wiring harnesses to route and cut, as well as the OBD-II ports under the dash. Fortunately, an Allison swap kit is available that eliminates the shift position indicator and replaces it with a remote-mounted digital readout gauge. Choosing the correct shifter will help you avoid issues later on.

The first step in the process of installing an Allison is to determine whether the vehicle is an ideal candidate for the transmission. For example, an Allison swap for a Ford Cummins should be performed on a truck that tows heavy loads over long distances, has over-sized tires or is subject to a lot of stress. If this is not possible, the swap should be avoided. If you have any hesitations, there is no harm in contacting a technician who can help.

The other step is to determine if you have a problem with your transmission. A faulty transmission can cause the vehicle to lock into a limp mode. This can happen due to severe overheating or towing a heavy load. Once in this state, it can be difficult to reverse. A rebuilt Allison transmission is a viable option. In addition to ensuring the transmission works properly, it can also improve the car’s overall functionality.

Another major concern is locating the correct transmission for the swap. An older F-250 can be converted to an Allison with the right transmission. It is important to note that the new transmission is larger and taller than the original Ford 4R100 transmission. A team from Mobile Diesel Service made sure to measure the vehicle to ensure that it will fit properly and won’t be a nuisance. In addition, the company made sure that the conversion process looked stock and had quality parts.

After a Ford Cummins swap, many Dodge truck owners are choosing the Allison 1000 series for their trucks. Diesel engines provide more torque, better acceleration, and higher towing capacity. Modifying a diesel engine is simple and affordable. Fortunately, there are many resources available for modifying diesel engines. These are very popular choices among Dodge truck owners. You may want to consider an Allison 1000 swap for your truck to get the best performance from your truck.

Early Chevy transmissions

There are several problems associated with early Chevy transmissions when trying to swap to a Cummins engine. For starters, a 6L Power Strike can be very unreliable. The good news is that the Cummins is highly reliable and very common. The bad news is that some states prohibit the use of agricultural engines in street vehicles, but that won’t stop you from getting a Cummins in your car!

While the early 6.0 was the “problem child” of the engine swap, there were problems with the later 24V Cummins, which is much more complex and contains more electronics. Even the Commonrail Cummins, which was introduced in 2003, had some high-pressure fuel rail issues and needed a Ford Cummins conversion kit. The 6.0 Ford truck was the most popular engine for a Cummins swap, but some enthusiasts have converted a 6.4 Ford truck. In addition to the 6.0, an early Chevy transmission can be adapted to an Allison 1000 or Ford 5r110 automatic transmission.

Another issue associated with a 6L80 transmission is that it may experience unwanted grade braking when not on a grade. It may also suffer from frequent up and down shifts without DTCs. These problems may occur because the BPP sensor is not properly learned in the ECM. To fix this problem, the ECM will have to be reprogrammed. Some owners have reported experiencing harsh shifts from 2-3 to 4-5.

In addition to this, a 68-RFE transmission has durability issues if power increases. It may be easier to install an Allison transmission than a Cummins. The Allison transmission is an easy swap, but you should be aware that 68-RFE transmissions have smaller clutch packs and shafts than their Allison counterparts. You should consult an expert before attempting to swap a transmission with an 68-RFE.

ATS manufactures an Allison 6 speed automatic transmission. Their transmissions are largely superior to the transmissions built by other companies. They can be installed behind a Cummins engine and are superior to the Ford Cummins swap. You can also opt for an Allison transmission from Custom Automatic Conversions. These transmissions are built with upgraded and heavy-duty parts. The main issue with this transmission is the lack of communication between the TCM and the rest of the truck.